BudsGunShop.com - Difference in 2 Sig Sauer AR
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Sig M400 SD1 and Sig M400 Tread theres a $600 difference in price curious what the difference was? I did see the SD1 has a upgraded trigger.
2 Answers

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Roger, the Sig M400 is a Pistol as it has an 11.5" FNC Carbon Steel Barrel with a 1:7" Twist Rate, Single Stage Polished Hard Coat Trigger and Shockwave Blade 2.0 Adjustable Pistol Brace. The SDI is a Rifle with a 16 inch Deep Fluted Barrel with a Free-Float VTAC Handguard, upgraded 2 Stage Match Grade Trigger, Adjustable Precision Stock and Cerakoted Finish.
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upgraded trigger, barrel, finish and stock since the Tread is out of stock the price may not be correct